PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-07:42:40
G10     275.3          42.5                5.9 +/-    1.51       8.2 +/-    1.51  0.040 / 0.040
G13     39.2           12.8                1.7 +/-    3.87       4.4 +/-    3.87  0.040 / 0.040
G15     52.3           42.1                3.1 +/-    0.97       4.4 +/-    0.97  0.050 / 0.040
G20     36.6           55.9                4.7 +/-    1.16       5.6 +/-    1.16  0.050 / 0.030
G21     26.6           75.8                5.2 +/-    0.78       5.3 +/-    0.78  0.080 / 0.130
G24     114.0          18.5                5.8 +/-    0.94      13.3 +/-    0.94  0.090 / 0.110
G27     314.2          25.0                3.4 +/-    2.19       6.6 +/-    2.19  0.160 / 0.360
G29     168.6          23.5                4.6 +/-    1.66       9.3 +/-    1.66  0.270 / 0.220
G32     205.2          17.4                4.7 +/-    1.40      10.9 +/-    1.40  0.100 / 0.140